Ring manufacture



Patented Ju y 6, 6' I DELBERT, I. WILSON/OF, COLUMBUS, oHIo, nssronon r n ws meanness; or

- COLUMBUS; 0310."

nine iviANUrhcrruanQ Application filed Mayra, 2 1925; sem n6. 32227,

, v This invention relates to the manufacture of finger rings and has special reference to the productionof seal or initial rings, the

primary object being the provision'of'simple means whereby to produce a finished ring in one piece'and'in an endless seamless circle,

and another object being the provision/of means whereby a design. may beapplied to the ring easily and expeditiously and will appear elearly in' the finished ring. The invention is illustrated in the accompanying drawings and will be hereinafter. frillyfdescribed, the novel features being particu larly pointed out in the appended "claims.

In the drawings, Figure- 1 is a perspective View of the dies employed in the practice of my invention, the dies being separated, p 7 I 1 Figures 2 and 3iarevertical sections, taken in planes at a right angle to each other, showing a ring and mandrel in position between the dies as before pressure is applied,

Figure 4: is a View in section showing another embodiment of the invention.

Fig. 5 is a detail of the mandrel. The ring blank or unfinished ring 1 is first produced by casting, and is then placed between the dies 2 and 3 to receive its final shape and have the surface ornamentation produced by the application [of pressure.

The dies 2,3, are hard steel'blocks of ,cOunterpart form, each having a grooved,- of semi-circular cross section, extend ng across its working face and 'alsoxihaving a matrix 5 formed across said groove, the floor or bottom of each matrix having engraved, or otherwise'formed, therein so much of the ornamental design as is to appear on'one shank of the ring. Each matrix is .of proper form to receive one shank of the ring, and a mandrel'6 of hard steel is inserted through thering and is accommodated in the grooves In practicing the invention, in the manner illustrated in Figures 1, 2 and 3, the ring blank is'cast slightly oversize so that it will not seatperfectly in the matrices inthe die blocks and'will rest on the wall of the matrix in the lower die. The blank is placed on the mandrel 6 and the mandrel then laid in the groove in the lower die, thus retaining the ring over and partly in the-transverse matrix in the die, and it may be here 7 noted 'thatthe mandrel is of a diameter to fit snugly in the ring and is very slightly tapered in order to facilitate its withdrawal fromthe ring. The upper die is placed over the lower die and'the ring and mandrel, being held in' properrelati0n thereto by the usual guide pins 7, so that'the ring enters its transverse matrix the mandrel fengages ts'groove, the mating working faces of the dies being about one-quarter of an each "other, thereby,"compressing fthe -ring about 'thei'mfandrel and in'the matrices, drive the *inetal d thering into intimatecon.- I tact-with thewall'sj of the matrices and "form v ing upon the ring whatever design may have been produced in the matrices. After the ring is removed from the dies, it will be necessary to merely remove a 'few thin overflow fins which may be formed thereon and mount a top, if a top is desired. 11111116 embodiment of the invention illustrated in Figure 4, the blank is cast somewhat undersize so" that it will freely enter the transverse recesses in the dies." The mandrel 8 is longer than the, mandrel 6 and is formed with a cylindrical end portion 9,

whereby it may be easily engaged'inthe ring, and With an intermediate portion 10 having a well-defined taper. The dies with the ring therein are placed inthe holder 11 and themandrel then engaged throughthe ringand the grooves of the dies, after which pressure is applied to the mandrel to drive its tapered portion throughflthe ring thereby expanding the ring within the matrices of the dies and transferring to the ring the designs of the dies."

It will be readily noted that Least the ring with an excess of metal, as at 12, on its v application'of pressure to either the-inandrel or the dies will force the ring into intimate contact with; the engraved surfaces of the dies and effectually produce the de sired designs on the shanks of the ring. Itis 7 also to be noted that the plane of the ring 7 when it is'in the dies is atright angle to thewor'king faces; oft-the diesjand that each die carries one-half of the complete design so that When the pressure is ithdrawn the dies -1'nay he 1 separated Without any alet-acement or other impairment of the r ing;

\Vhile I have referred particularly torings having ornamented shanks, it is toloe understood that the inventionis not limited to. the

production of such rings'butinay be applied t the .manuiactu-re of other styles of rings and tspacnii inane heavy gold rin for individualengraving o' a I "Having jfiilly Lcl'espribed invention ihat 1 than as new taind -dfisire to securehy Letters Patent," i Si2 I 4 1 Means fo sw a Hi in fi e r n s coinprisilliga ofitlies ftorecei ve a ficast sean -less r ng hetizveen them with the 'plane of th e-1 Late i h a e e h pla ed the workingflfaces --of-,t11edies, the working l te-cs o eh -d eh s n e t ix coniorniing to on. half ;o f-th iririgi and -havins de i n t b Ira efi a e s an dies and passing 1w1thin.;the matrices.

2. Means for manufacturing finger rings comp-rising a pair of dies each having 'a groove extending across its face" and also having a 'rnatrixat a right angle to said 3 1 -0379, the matrix conforming to one -half of a seamless cast ring'to .ibe r'e'ceivecl' therein at a right angle to the Working face of the die and bearing one-halfiof adesign to betransferredto the ring, and a mandrel ex 7 tending'through the grooves and across and between the matrices to retain" thering in "engagement with the matrices whereby upon pl'ication of rpres'sure the ring will "be to'rced into intimate contact with "the sur- V faces of the matrices and the' designoft-he .ina'tricles 'tr'ansterred to'the ring, 1 5

V In testimony whereof, I have signed this specification. i EDELBERT I. 'VVILSON. 

